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Finding the Fourth Proportional to 28,329, 42,494.40 and 8,607.73

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Solution

The fourth proportional to 28,329, 42,494.40 and 8,607.73 is: 12,911.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,329 : 42,494.40 = 8,607.73 : x
  2. Step 2: Convert to fraction form
    28,329/42,494.40 = 8,607.73/x
  3. Step 3: Cross multiply
    28,329x = 42,494.40 × 8,607.73
  4. Step 4: Simplify right side
    28,329x = 365,780,321.71
  5. Step 5: Solve for x
    x = 365,780,321.71/28,329
  6. Step 6: Final answer
    x = 12,911.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.